1、 STD-ITU-T RECMN JoL32-ENGL L998 m 4862591 Ob53735 420 m INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU J.132 (03198) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Transport of MPEG-2 signals on packetised networks Tra
2、nsport of MPEG-2 signals in SDH networks ITU-T Recommendation J. 132 (Previously CClTT Recommendation) ITU-T J-SERIES RECOMMENDATIONS TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations J. 1-J.9 General specifications for analogue sound-programme transmis
3、sion Performance characteristics of analogue sound-programme circuits J.10-J.19 J.20-J.29 Equipment and lines used for analogue sound-programme circuits J.30-J.39 Digital encoders for analogue sound-programme signals Digital transmission of sound-programme signals J.40-J.49 J.50-J.59 Circuits for an
4、alogue television transmission J.60-J.69 Analogue television transmission over metallic lines and interconnection with radio-relay J.70-J.79 links Digital transmission of television signals J.80-5.89 Ancillary digital services for television transmission J.90-J.99 Operational requirements and method
5、s for television transmission J.100-J.109 Interactive svstems for digital television distribution J.110-J.129 Measurement of the quality of service Digital television distribution through local subscriber networks J.140-J.149 J.150-J.159 For further details, please refer to ITU-T List of Recommendat
6、ions. STDoITU-T RECMN JOL32-ENGL L998 m 4862591 Ob53737 2T3 m ITU-T RECOMMENDATION 5.132 TRANSPORT OF MPEG-2 SIGNALS IN SDH NETWORKS Summary This Recommendation provides the requirements for an equipment called “SDH network adapter“ for the transport of MPEG-2 signals over SDH networks. It describes
7、 the necessary operations to adapt the MPEG-2 transport streams into a STM-1 or sub-STM-1 fiame and the functional characteristics associated to this equipment. Source ITU-T Recommendation 5.132 was prepared by ITU-T Study Group 9 (1997-2000) and was approved under the WTSC Resolution No. 1 procedur
8、e on the 18th of March 1998. Recommendation 5.132 (03/98) i STD-ITU-T RECMN J-132-ENGL L998 4862593 0651738 L3T m FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-
9、T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets eve
10、ry four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. l. In some areas of information technology
11、 which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL
12、PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, wh
13、ether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors
14、are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopyin
15、g and microfilm, without permission in writing from the ITU. 11 Recommendation 5.132 (03/98) CONTENTS Scope References Terms and definitions . Acronyms and abbreviations Conventions Network adapter overview 6.1 Functional description . 6.2 SDH overhead information . Detailed description of the basic
16、 functions . 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.1 1 7.12 7.13 7.14 7.15 7.16 7.17 7.18 MPEG Physical Interface (MPI) . 7.1.1 Basic characteristics 7.1.2 Additional characteristics for System A (European system) . MPEG ATM Adaptation (MAA) 7.2.1 Signal processing in the transmitter (Signal fl
17、ow from b to c in Figure 1) . 7.2.2 Signal processing in the receiver (Signal flow from c to b in Figure 1) Virtual Path Entity (VPE) . 7.3.1 Signal processing in the transmitter (Signal flow from c to d in Figure 1) . 7.3.2 Signal processing in the receiver (Signal flow from d to c in Figure 1) Vir
18、tual Path Multiplexing Entity (VPME) 7.4.1 Signal processing in the transmitter (Signal flow from d to e in Figure 1) . 7.4.2 Signal processing in the receiver (Signal flow from e to d in Figure 1) Sm Trail Termination (Sm-TT) VC-n to VC-m Adaptation (SdSm-A) . VC-n Trail Termination (Sn-TT) STM-1 M
19、ultiplex section to VC-n layer Adaptation (MSUSn-A) . STM-1 Multiplex Section Trail Termination (MS1-TT) STM-1 Regenerator Section to Multiplex Section Adaptation (RSlMSl-A) . STM-1 Regenerator Section Trail Termination (RS1-TT) . STM-1 Optical Section to Regenerator Section Adaptation (OSlRSl-A) ST
20、M-1 Electrical Section to Regenerator Section Adaptation (ES 1RS 1-A) . STM-1 Optical Section Trail Termination (OS1-TT) STM-1 Electrical Section Trail Termination (ES1-TT) . Synchronous Equipment Timing Source (SETS) Synchronous Equipment Timing Physical Interface (SETPI) . Equipment Management Fun
21、ction (EMF) 7.18.1 Configuration 7.18.2 Fault (maintenance) management 7.18.3 Performance management . Annex A . Transport within Sub-STM-1 at 5 1 Mbit/s A . 1 Functional description . A.2 Radio-Relay Sub-STM-1 Multiplex Section Adaptation (RR-MSA) . A.3 . Radio-Relay Sub-STM-1 Multiplex Section Ter
22、mination (RR-MST) A.4 Radio-Relay Sub-ST“ 1 Regenerator Section Termination (RR-RST) . A.5 Radio-Relay Sub-STM-1 Synchronous Physical Interface (RR-SPI) . Appendix I - Mechanism of the adaptive clock method Appendix II - Enabling/disabling the Header Error Control functions . Appendix III - Transmis
23、sion capacity ofthe Network Adapter Recommendation 5.132 (03/98) Page 1 1 2 2 4 4 4 8 5 8 8 11 13 13 15 15 16 17 17 17 18 19 19 19 20 20 20 20 20 20 20 20 20 20 21 22 23 23 27 27 29 29 29 29 30 30 31 . 111 Recommendation 5.132 TRANSPORT OF MPEG-2 SIGNALS IN SDH NETWORKS (Geneva, 1998) 1 Scope This R
24、ecommendation specifies the transmission of MPEG-2 transport streams within SDH networks working at the G.707 hierarchical bit rate of 155 520 kbit/s or at a bit rate of 51 840 kbit/s. The use of any of these bit rates is optional, if however one or more rates are selected the complete specification
25、 applies. The definition of the network aspects of the transmission of MPEG-2 transport streams is based to the maximum extent on existing international standards. The equipment considered in this Recommendation is the Network Adapter performing the adaptation between MPEG-2 transport streams and th
26、e interfaces of SDH networks. The bit rates and the frames structures for STM-N signals, the SDH multiplexing structures and the different overheads of an STM-N frame (POH, SOH) are specified in Recommendation G.707. The application of this Recommendation is restricted to a physical layer point-to-p
27、oint connection without ATM connection fnctionality at intermediate points. 2 References The following ITU-T Recommendations, and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicate
28、d were valid. All Recommendations and other references are subject to revisions; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T
29、Recommendations is regularly published. EN 50083-9 (1998), Cabled distribution systems for television, sound and interactive multimedia signals; Part 9: Interfaces for CATV/SMATV headends and similar professional equipment for DVB/MPEG-2 transport streams. ETR 290 (1997), Digital Video Broadcasting
30、(DVB); Measurement guidelines for DVB systems. ITU-R Recommendation F.750-3 (1997), Architectures and functional aspects of radio-relay systems for SDH-based networks. ITU-T Recommendation G.707 (1996), Network node interface for the Synchronous Digital Hierarchy (SDH). ITU-T Recommendation G.783 (1
31、997), Characteristics of Synchronous Digital Hierarchy (SDH) equipment functional blocks. ITU-T Recommendation G.826 (1996), Error performance parameters and objectives for international, constant bit-rate digitaIpaths at or above the primary rate. ITU-T Recommendation H.222.0 (1995) I ISOAEC 1381 8
32、-1 :1996, Information technology - Generic coding of moving pictures and associated audio information: Systems. ITU-T Recommendation 1.361 (1 995), B-ISDN ATM layer speczjcation. ITU-T Recommendation 1.363.1 (1996), B-ISDNATMadaptation layer (AAL) speczfication - Type I AAL. ITU-T Recommendation 1.4
33、32 (1996), B-ISDN user-network interface - Physical layer specification. ITU-T Recommendation 1.732 (1996), Functional characteristics of ATM equipment. Recommendation 5.132 (03/98) 1 - ITU-T Recommendation J.82 (1 996), Transport of WEG-2 constant bit-rate television signals in B-ISDN. - ITU-T Reco
34、mmendation 5.83 (1997), Digital multi-programme systems for television, sound and data services for cable distribution. - ITU-T Recommendation M.2120 (1997), Digital paths, section and transmission system fault detection and localization procedures. - ITU-T Recommendation 4.822 (1994), Stage I, stag
35、e 2 and stage 3 description for the Q3 interface - Performance management. 3 Terms and definitions This Recommendation defines the following terms. 3.1 fixed stuff: Bytes that are used to fill up unused data positions. 3.2 MPEG-2 Transport Stream (TS) packet: A data packet possessing a length of 188
36、 bytes including 4 bytes of header information. The header contains WEG related data. 3.3 RS coded MPEG-2 Transport Stream (TS) packet: A data packet possessing a length of 204 bytes. Bytes 1 to 188 contain an MPEG-2 transport stream packet. Bytes 189 to 204 contain the parity-check bytes for the er
37、ror correction of the preceding bytes of this packet. These parity-check bytes are generated using a shortened Reed-Solomon Code RS (204, 188) as specified in Annex NJ.83. 4 Acronyms and abbreviations This Recommendation uses the following abbreviations: AAL AI S AS1 ATM AU AUG BER C-n CRC CS DEG EB
38、C EMF ES FAS FEC GFC HEC 2 ATM Adaptation Layer Alarm Indication Signal Asynchronous Serial Interface Asynchronous Transfer Mode Administrative Unit Administrative Unit Group Bit Error Rate Container-n Cyclic Redundancy Check Convergence Sublayer DEGraded Error Block Count Equipment Management Funct
39、ion Errored Second Frame Alignment Signal Forward Error Correction Generic Flow Control Header Error Control Recommendation 5.132 (03/98) HOVC LCD LMC LOF LOM LOP LOS LOVC LTI MAA MP MPEG MPI MSA MSOH MST NE PDU PLM POH PT RD1 REI RF1 RR RS RSOH RST SAP SAR SC SDH SETPI SETS SES SN SNI Higher Order
40、Virtual Container Loss of Cell Delineation Lost and Misinserted Cells Loss of Frame Loss of Multifiame Loss of Pointer Loss of Signal Lower Order Virtual Container Loss of Timing Inputs MPEG ATM Adaptation Management Point Moving Pictures Experts Group MPEG Physical Interface Multiplex Section Adapt
41、ation Multiplex Section Overhead Multiplex Section Termination Network Element Protocol Data Unit Payload Label Mismatch Path Overhead Payload Type Remote Defect Indication Remote Error Indication Remote Failure Indication Radio Relay Reed-Solomon Regenerator Section Overhead Regenerator Section Ter
42、mination Service Access Point Segmentation And Reassembly sublayer Sequence Count Synchronous Digital Hierarchy Synchronous Equipment Timing Physical Interface Synchronous Equipment Timing Source Severely Errored Second Sequence Number Sequence Number Invalid Recommendation 5.132 (03/98) 3 SOH SPI S
43、SF SS1 STM TD TF TIM TS TSLE Tu u1 UNEQ vc VCI VP VPE VPI VPME WTR 5 Section Overhead Synchronous Parallel Interface; Synchronous Physical Interface Server Signal Fail Synchronous Serial Interface Synchronous Transport Module Transmit Degrade Transmit Fail Trace Identifier Mismatch Transport Stream
44、Transport Stream synchronization Loss Error Tributary Unit Unit Interval UNEQuipped Virtual Container; Virtual Channel Virtual Channel Identifier Virtual Path Virtual Path Entity Virtual Path Identifier VP Multiplexing Entity Wait to Restore Conventions Unless otherwise mentioned, in this Recommenda
45、tion the following conventions hold true: - The order of transmission of information in all diagrams is first from left to right and then from top to bottom. Within each byte or octet the most significant bit is transmitted first. - The term “VC-n“ is used for higher order VC (VC-3 and VC-4). - The
46、term “VC-m“ is used for lower order VC (VC-3, VC-2, VC-12 and VC-11). 6 Network adapter overview 6.1 Functional description The Network Adapter is an equipment which performs the adaptation of data structured as an MPEG-2 Transport Stream to the characteristics of an SDH link. The solution selected
47、for the transmission of MPEG-2-TS packets, or optionally for the transmission of RS coded MPEG-2-TS packets, over SDH links is based on the use of ATM cells. Therefore, the adaptation of the transport of an MPEG-2-TS basically consists in: - adaptation of MPEG-2-TS packets or RS coded MPEG-2-TS pack
48、ets to ATM cells; - adaptation of ATM cells to SDH framing. NOTE - The processing of ATM VC level is not performed. 4 Recommendation 5.132 (03198) STDeITU-T RECMN J-132-ENGL 1998 48b2.591 Ob51744 433 m The normative references applicable to the adaptation unless specifically mentioned are given here
49、 below: - the adaptation of WEG-2-TS packets into ATM cells using an AAL type 1 shall be performed as described in Recommendation J.82. AAL type 1 is specified in Recommendation 1.363.1, the ATM layer is specified in Recommendation 1.3 6 1 ; - the adaptation of ATM cells into SDH framing shall be performed as described in Recommendation G.707. There is no normative reference for the adaptation of RS coded MPEG-2-TS packets to ATM cells. This adaptation shall be performed as described in Recommendation 5.82 for MPEG-2-TS packets, with the only exception that the RS coded MPEG-2-TS packet
